[Verse 1]
A tiny sea squirt starts as a swimmer,
tail like a whip, a notochord shimmer,
hunting a rock in the salty blue —
once it lands, it's got nothing to do.
It glues its head down, calls it home,
then it eats its own brain, bone by bone.
No more swimming, no more choosing,
the nervous system it's slowly losing.
[Chorus]
Mover é viver — o cérebro quer mexer
(to move is to live, the brain wants to move)
Why do we think? Why do we feel?
So the body can act, so the plan gets real
Sem movimento não há razão —
without movement, there's no reason for a brain
Mover é viver, essa é a lição
[Verse 2]
Wolpert says it plain and true:
brains aren't for poems, they're for what you do.
Every thought you've ever had
funnels down to a muscle, good or bad.
No arms to wave, no voice to call,
without movement the mind can't act at all.
The only way to touch the world outside
is a motor command, a muscular tide.
[Verse 3]
Three problems stack like a puzzle's frame:
first, selection — what's the game?
Pick the action from the menu of choices,
drown out all the competing voices.
Then comes planning, work out how,
sequence the steps, decide on now.
Last, execution — make it precise,
correct the arm when it rolls the dice.
[Chorus]
Mover é viver — o cérebro quer mexer
Selection, planning, execution — essa é a lição
Sem movimento não há razão —
without movement, there's no reason for a brain
Mover é viver, essa é a lição
[Bridge]
Bernstein counted joints and found too many keys,
more degrees of freedom than one task needs ease.
Shoulder, elbow, wrist, and hand —
a thousand paths to where you planned.
Degrees of freedom, a problem to solve:
how does the body just resolve?
Muscles linking up in trusted teams,
taming an ocean of infinite schemes.
[Verse 4]
These three problems don't just fade away,
they echo loud in chapters down the way.
Cortex plans it, calculates the line,
basal ganglia picks what's fine,
cerebellum tunes it, smooths the ride,
correcting errors, matching stride.
Remember the squirt that ate its brain —
no movement needed, no neurons to maintain.
[Verse 5]
The eyes send maps, the skin sends song,
proprioception keeps the balance strong.
Feedback loops race back to the brain,
correcting the plan through loss and gain.
Vision guides the reaching hand,
touch confirms the way we stand,
whispers from the world outside
tell the motor plan where to ride.
Without the senses singing true,
the strongest plan has nothing to do —
so the loop goes round and round,
until the perfect move is found.
[Outro]
Mover é viver, o cérebro quer mexer,
choose it, plan it, make it true —
that's the reason brains came through.
Sem movimento não há razão,
mover é viver, essa é a lição.
[Chorus]
Mover é viver — o cérebro quer mexer
Why do we think? Why do we feel?
So the body can act, so the plan gets real
Sem movimento não há razão —
without movement, there's no reason for a brain
Mover é viver, essa é a lição